US3433792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylpyridine production
Assignee: Shell USA Inc
•
Filing: 1965-07-19
•
Granted: 1969-03-18
•
Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Charles R Adams
- 👤 Jurgen F Falbe
- 👤 Friedrich W A G K Korte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:46
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/185; B01J27/1853
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2877228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |